That's right, the stunning Lamborghini Reventon Roadster you see above is just a replica. It's built on a custom-designed tube chassis, complete with an imported original Gallardo Superleggera V10 mid-engine 4.9i (includes aluminium block and head and a six gear transmission). While not as fast as the real Reventon, forced induction should take care of the speed issues. Continue reading for a video and more pictures.